286  
CDUS41 KLWX 012145  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
445 PM EST MON FEB 01 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 1 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 31 3:59 PM 75 2002 44 -13 50  
MINIMUM 26 7:34 AM 2 1965 24 2 24  
AVERAGE 29 34 -5 37  
 
PRECIPITATION (IN)  
TODAY 0.27 1.44 2008 0.10 0.17 0.10  
MONTH TO DATE 0.27 0.10 0.17 0.10  
SINCE DEC 1 8.04 5.74 2.30 6.40  
SINCE JAN 1 2.23 2.78 -0.55 3.43  
 
SNOWFALL (IN)  
TODAY 0.7 1.5 1966 0.3 0.4 0.0  
MONTH TO DATE 0.7 0.3 0.4 0.0  
SINCE DEC 1 6.3 11.1 -4.8 2.9  
SINCE JUL 1 6.3 11.6 -5.3 2.9  
SNOW DEPTH 3  
 
DEGREE DAYS  
HEATING  
TODAY 36 31 5 28  
MONTH TO DATE 36 31 5 28  
SINCE DEC 1 1742 1899 -157 1632  
SINCE JUL 1 2409 2815 -406 2495  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 13.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FREEZING RAIN  
LT FREEZING RAIN  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 2:00 AM  
LOWEST 84 6:00 AM  
AVERAGE 88  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 68 1990  
MINIMUM TEMPERATURE (F) 24 5 2004  
 
SUNRISE AND SUNSET  
FEBRUARY 1 2021......SUNRISE 7:16 AM EST SUNSET 5:31 PM EST  
FEBRUARY 2 2021......SUNRISE 7:15 AM EST SUNSET 5:33 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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